Bar-duty blender

Reduces ice and solids to a suspension by driving the load repeatedly through a blade at speed, in a jar shaped to keep it circulating.

A blender is a motor, a blade and a JAR, and most of what operators attribute to the motor belongs to the jar. The blade does not cut the load — it cuts what reaches it, and what brings the load back to the blade is geometry: a tapered body and internal ribs break up the rotating mass so it folds down through the centre instead of spinning as one plug. When it does spin as a plug, a cavity opens around the blade, nothing reaches it, the motor unloads and the sound rises. That is cavitation, and it is why a drink comes out with a layer of unbroken ice on top however long the cycle runs — the fix is more liquid or a plunger, never more time. POWER IS SOLD AS FINENESS AND BOUGHT AS ENDURANCE. What a bar-duty motor actually buys is the ability to take a near-stalled load repeatedly through a service without reaching thermal cut-out; a domestic blender makes an acceptable single drink and fails on the tenth, and it fails on a Saturday. The last mechanism is heat: a blend puts energy into the drink, so a cycle extended to fix a texture problem returns a thinner, warmer drink than the same recipe blended briefly. Every one of those three mechanisms points at the same operating rule — watch the jar, not the clock.

• Buy DUTY, not headline power. The question that separates these machines is how many consecutive blended drinks the motor will deliver at peak without reaching thermal cut-out, and it is answered by the duty rating and the cooling path, not by the figure printed on the box. Ask suppliers for continuous-duty behaviour under a heavy load, not for a rating taken on one drink.
• Count jars against the peak AND the allergen map, which are two separate counts that both have to be satisfied. One jar on a menu carrying dairy, plant milk and nut ingredients means either a full wash between every drink or a drink that carries the last one's ingredient — and under pressure it means neither happens, which is the worst of the three outcomes and the one nobody chose.
• Programme the cycle as soon as the menu carries more than a couple of blended drinks. A timed programme is the cheapest consistency control on the bar: it removes an individual judgement made under pressure, it survives staff turnover, and it makes a recipe change a deliberate act rather than a drift. Name the person who owns the programmes.
• Buy a jar you can see through, and replace it the moment you cannot. Judging a blend by what the jar shows is the operating skill this machine requires, and an opaque or crazed jar removes it — after which the team judges by time, which is the fault this entry exists to prevent.
• Decide the noise question in the actual room, at the volume the venue actually runs at, before the fit-out is fixed. A blender in a small seated space is a conversation-stopper on every order and it is heard by every guest, not just the one who ordered. The enclosure, the position and the acoustic treatment are all cheaper decided now than retrofitted.
• Match the machine to the ICE FORM you chose, and re-test every blended recipe if that form ever changes. Cube is the hardest load a blender is given; the soft forms blend faster and carry more water into the drink, so the same recipe on a different ice is a different drink. This is the crossing point where the ice machine decision lands on this machine.
• Cost the WASHING before the purchase. Blended drinks are the most wash-intensive items a bar sells and the jar is the bottleneck on every round. If the sink run and the drying space are not within reach of the station, the jar will be rinsed instead of washed, and the allergen argument above collapses on the first busy afternoon.
• Confirm the electrical position with a licensed electrician before the joinery is built. A bar-duty blender is a motor load whose starting demand differs from its running demand, and whether it shares a circuit is determined by the total connected load and the local code. This site states no amperages.
• Ask what the bar serves when it fails, and answer it before it does. There is no manual fallback for a blended menu — no technique substitutes for the machine — so the plan is either a second machine, a named repair route with a response time, or an agreed list of drinks that come off the menu that day.